PI wire harness silica gel sealing structure

Abstract

The utility model discloses a PI wire harness silica gel sealing structure, and relates to the wire harness sealing technology field, the PI wire harness silica gel sealing structure comprises a wire harness and a sealing structure installed at a wire harness end head, the sealing structure comprises a lower cover plate, the top end of the lower cover plate is provided with an upper cover plate, the wire harness end head is fixedly arranged between the lower cover plate and the upper cover plate, and the upper cover plate is provided with a lower cover plate. The opposite sides of the lower cover plate and the upper cover plate are bonded and fixed; the coating layer is arranged between the lower cover plate and the upper cover plate, and the coating layer is used for sealing and waterproofing between the lower cover plate and the upper cover plate. According to the utility model, the coating layer is arranged between the upper cover plate and the lower cover plate of the sealing structure, and the upper cover plate and the lower cover plate are fixed in a bonding manner, so that the sealing performance of the sealing structure on the end of the wire harness is higher, and the waterproof effect of the wire harness is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wire harness sealing, and particularly relates to a PI wire harness silicone sealing structure. Background Technique

[0002] A wire harness is generally used for connecting between electrical devices in electrical equipment and can conduct electricity or signals. In a wire harness, various wires or cables are bundled together and fixed and protected with various insulating materials, nuts, binding tapes, pot closures, heat shrinkable tubes, etc. It is widely used in various electronic devices, automobiles, airplanes, household appliances, and industrial control systems.

[0003] In the prior art, the end parts of each component cable in the wire harness are generally welded to the circuit board, and the end parts of the wire harness and the circuit board are wrapped together by a housing to play a packaging and protection role. However, the sealing effect between the circuit board and the cable at the end position of the wire harness is not good at present, and it is easy to be invaded by moisture and humidity, which easily leads to electrical faults or mechanical damages of the wire harness, thus affecting the use quality of the wire harness. Therefore, a PI wire harness silicone sealing structure is proposed herein. Content of the Utility Model

[0004] The purpose of the utility model is to provide a PI wire harness silicone sealing structure to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A PI wire harness silicone sealing structure, including a wire harness and a sealing structure installed at the end of the wire harness, the sealing structure includes:

[0006] A lower cover plate, an upper cover plate is arranged at the top of the lower cover plate, the end of the wire harness is fixedly arranged between the lower cover plate and the upper cover plate, and the opposite sides of the lower cover plate and the upper cover plate are adhesively fixed;

[0007] A coating layer, the coating layer is arranged between the lower cover plate and the upper cover plate, and the coating layer is used for sealing and waterproofing between the lower cover plate and the upper cover plate.

[0008] Preferably, the sealing structure further includes a PI layer, the PI layer is fixedly arranged on the side of the lower cover plate facing the upper cover plate, and the coating layer is sprayed on the surface of the PI layer facing the upper cover plate.

[0009] Preferably, the sealing structure further includes a silicone rubber layer, and the silicone rubber layer is fixedly connected to the side of the upper cover plate facing the lower cover plate.

[0010] Preferably, the silicone rubber layer and the PI layer are fixedly bonded by high-temperature curing.

[0011] Preferably, the silicone rubber layer is made of silicone rubber, the PI layer is made of polyimide material, and the coating layer is a PI adhesive.

[0012] Preferably, the side of the silicone rubber layer bonded to the PI layer is the semi-cured surface of the semi-cured silicone rubber.

[0013] Technical effects and advantages of the present utility model:

[0014] By arranging a coating layer between the upper cover plate and the lower cover plate of the sealing structure and fixing them by bonding between the upper cover plate and the lower cover plate, the present utility model makes the sealing performance of the sealing structure at the end of the wire harness higher, thereby improving the waterproof effect of the wire harness. Description of the drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0016] Figure 2 It is a three-dimensional structure schematic diagram of the lower cover plate of the present utility model.

[0017] Figure 3 It is a three-dimensional structure schematic diagram of the upper cover plate of the present utility model.

[0018] In the figure: 100, wire harness; 200, sealing structure; 201, lower cover plate; 202, upper cover plate; 203, coating layer; 204, silicone rubber layer; 205, PI layer. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0020] The present utility model provides as Figures 1-3A PI wire harness silicone sealing structure as shown, includes a wire harness 100 and a sealing structure 200 installed at the end of the wire harness 100. The sealing structure 200 includes a lower cover plate 201, and an upper cover plate 202 is provided at the top of the lower cover plate 201. The end of the wire harness is fixedly arranged between the lower cover plate 201 and the upper cover plate 202. A coating layer 203 is arranged between the lower cover plate 201 and the upper cover plate 202. The coating layer 203 is used for sealing and waterproofing between the lower cover plate 201 and the upper cover plate 202. The opposite side of the lower cover plate 201 and the upper cover plate 202 is adhesively fixed; the coating layer 203 is a surface active treatment agent, and the best one is a PI adhesive. Preferably, the coating layer 203 is located at the uppermost layer position on the side of the lower cover plate 201 facing the upper cover plate 202. The coating layer 203 is formed by applying the PI adhesive to the surface of the lower cover plate 201 facing the upper cover plate 202. Then, by cooperating with the upper cover plate 201 and the lower cover plate 202 to fix the wire harness 100 between them in an adhesive manner, it can achieve a stable fixation and good sealing of the wire harness 100, so that the connection between the end of the wire harness 100 and the circuit board has good waterproof performance.

[0021] It should be noted that the sealing structure 200 further includes a PI layer 205. The PI layer 205 is fixedly arranged on the side of the lower cover plate 201 facing the upper cover plate 202. The PI layer 205 is made of polyimide material; the coating layer 203 is sprayed on the surface of the PI layer 205 facing the upper cover plate 202; in addition, the sealing structure 200 further includes a silicone rubber layer 204. The silicone rubber layer 204 is fixedly connected to the side of the upper cover plate 202 facing the lower cover plate 201. The silicone rubber layer 204 is made of silicone rubber material; the connection between the silicone rubber layer 204 and the PI layer 205 is a high-temperature curing adhesive fixation. The side of the silicone rubber layer 204 adhered to the PI layer 205 is a semi-cured silicone rubber raw surface;

[0022] In the above embodiments, by coating the PI adhesive in the surface active treatment agent on the surface of the PI layer 205 made of polyimide material on the side of the lower cover plate 201 facing the upper cover plate 202, a coating layer 203 is formed on the side of the PI layer 205 facing the upper cover plate 202. At the same time, a silicone rubber layer 204 is fixedly assembled on the side of the upper cover plate 202 facing the lower cover plate 201. Then, through the high-temperature curing bonding process, the silicone rubber layer 204 and the PI layer 205 coated with the PI adhesive on the lower cover plate 201 are bonded together when the PI layer 205 is cured at high temperature. After the upper cover plate 201, the lower cover plate 202 and the end of the wire harness 100 are bonded together, the stability of the fixation among the three can be improved, and at the same time, the waterproof effect of the wire harness 100 is better, which helps to improve the use quality of the wire harness 100; by coating the PI adhesive on the surface of the PI layer 205, the surface energy and wettability of the PI layer 205 can be changed, and the bonding strength between the PI layer 205 and the silicone rubber layer 204 is enhanced. In this way, the firmness of the bonding of the wire harness 100 between the lower cover plate 201 and the upper cover plate 202 can be improved. At the same time, the PI adhesive has good chemical compatibility and can meet the bonding with a variety of substrates without causing chemical reactions. In this way, the chemical stability of the PI layer 205 during high-temperature bonding with the silicone rubber layer 204 can be ensured. In addition, the PI layer 205 is made of polyimide material and has excellent high-temperature resistance. The PI adhesive can maintain the bonding strength and stability in a high-temperature environment, so that when the wire harness 100 is used in a high-temperature environment, it will not loosen or fall off, and has strong stability. Moreover, the PI adhesive also has strong chemical corrosion resistance and can be used in a harsh chemical environment to protect the bonded part from chemical erosion. Therefore, the sealing structure 200 has a stronger sealing and waterproof effect on the wire harness 100, improving the use quality of the wire harness 100.

[0023] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A PI wire harness silicone sealing structure, comprising a wire harness and a sealing structure (200) installed at the end of the wire harness, characterized in that, The sealing structure (200) includes: A lower cover plate (201), with an upper cover plate (202) provided at the top of the lower cover plate (201). The end of the wire harness is fixedly arranged between the lower cover plate (201) and the upper cover plate (202), and the opposite sides of the lower cover plate (201) and the upper cover plate (202) are adhesively fixed. A coating layer (203), which is arranged between the lower cover plate (201) and the upper cover plate (202), and is used for sealing and waterproofing between the lower cover plate (201) and the upper cover plate (202).

2. The silicone sealing structure of a PI wire harness according to claim 1, characterized in that The sealing structure (200) further includes a PI layer (205), which is fixedly arranged on the side of the lower cover plate (201) facing the upper cover plate (202), and the coating layer (203) is sprayed on the surface of the PI layer (205) facing the upper cover plate (202).

3. The PI wire harness silicone sealing structure according to claim 2, characterized in that, The sealing structure (200) further includes a silicone rubber layer (204), which is fixedly connected to the side of the upper cover plate (202) facing the lower cover plate (201).

4. A PI wire harness silicone sealing structure according to claim 3, characterized in that, The connection between the silicone rubber layer (204) and the PI layer (205) is fixed by high-temperature curing bonding.

5. The PI wire harness silicone sealing structure according to claim 4, characterized in that, The silicone rubber layer (204) is made of silicone rubber material, the PI layer (205) is made of polyimide material, and the coating layer (203) is a PI adhesive.

6. The PI wire harness silicone sealing structure according to claim 5, characterized in that, The side of the silicone rubber layer (204) bonded to the PI layer (205) is the half-cured and half-uncured surface of the silicone rubber.

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